nanoHUB.org enables the assembly of animated image sequences which can be powerful tols for illustration in educational settings. The images below are taken from the "Piecewise Contentant Potential Lab" and illustrate nicely various concepts of bandstructure formation in open systems as well as quasi-periodic structures.
Barrier height 110meV, well width 6nm barrier width 2nm:
Barrier height 400meV, well width 6nm barrier width 2nm:
Barrier height 400meV, well width 8nm barrier width 2nm: